Selection Theory of Dendritic Growth with Anisotropic Diffusion
Selection Theory of Dendritic Growth with Anisotropic Diffusion
复制标题
各向异性扩散枝晶生长的选择理论
DOI:
10.1155/2015/529036
复制
发表时间:
2015
影响因子:
1.5
通讯作者:
K. Kassner
中科院分区:
文献类型:
--
作者:
M. von Kurnatowski;K. Kassner
Dendritic patterns frequently arise when a crystal grows into its own undercooled melt. Latent heat released at the two‐phase boundary is removed by some transport mechanism, and often the problem can be described by a simple diffusion model. Its analytic solution is based on a perturbation expansion about the case without capillary effects. The length scale of the pattern is determined by anisotropic surface tension, which provides the mechanism for stabilizing the dendrite. In the case of liquid crystals, diffusion can be anisotropic too. Growth is faster in the direction of less efficient heat transport (inverted growth). Any physical solution should include this feature. A simple spatial rescaling is used to reduce the bulk equation in 2D to the case of isotropic diffusion. Subsequently, an eigenvalue problem for the growth mode results from the interface conditions. The eigenvalue is calculated numerically and the selection problem of dendritic growth with anisotropic diffusion is solved. The length scale is predicted and a quantitative description of the inverted growth phenomenon is given. It is found that anisotropic diffusion cannot take the stabilizing role of anisotropic surface tension.
登录
查看更多内容
DOI:
--
发表时间:
1978
期刊:
影响因子:
--
作者:
F. Rondelez;W. Urbach;H. Hervet
通讯作者:
H. Hervet
影响因子:
8.6
作者:
p wald PO;Bechhoefer;Libchaber
通讯作者:
Libchaber
影响因子:
1.8
作者:
E. R. Rubinstein;M. Glicksman
通讯作者:
M. Glicksman
DOI:
10.1088/1751-8113/47/32/325202
发表时间:
2014
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
作者:
M. von Kurnatowski;K. Kassner
通讯作者:
K. Kassner
DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
C. Misbah
通讯作者:
C. Misbah